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Mat conjuntos numericos  003 exercicios
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Mat conjuntos numericos 003 exercicios

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  • 1. EXERCÍCIOS SOBRE CONJUNTOS NUMÉRICOS1) Quais das proposições são verdadeiras?a) 3 ∈ 1 d) ∈ 2b) N ⊂ e) 4 ∈c) Z ⊂ f) 3∈2) Complete, usando as propriedades especificadas:a) 32 . 45 = (comutativa)b) 5(2 +3 ) = (distributiva)c) 7 + 0 = (elemento neutro) 1d) 3 . = (elemento inverso) 33) Efetue:a) (-4)(-3)=..........b) (2)(-4)(3) =..............c) (-3)6 =...............4) Complete com verdadeiro ou falso, para todo a real:( ) – (– a + 3) = a + 3( ) – (1 – a) = –1 + a( ) –2 – a = – (2 + a)5) Efetue: 1 7 8 4 −2a) + = e) ⋅ = 3 3 5 3 h) 3 = 2 2 3  1  6b) − = f) −  ⋅ −  = 7 5 7  3  8 a a 2 1 i) Sendo bcd ≠ 0 , − =c) -2 + = 12 bc cd 3 4 g) 10 = 2 3 1 3d) − + = 8 3 4 5
  • 2. RESPOSTAS DOS EXERCÍCIOS SOBRE CONJUNTOS NUMÈRICOSINTRODUÇÃO:1)a) V b) V c) V d) V e) V f) VPROPRIEDADES2) a) 45.32 b) 5.2 + 5.3 c) 0 + 7 = 7 d) 1EFETUE3) a) 12 b) – 24 c) – 18REGRA DE SINAL4) a) F b) V c) VEFETUE 8 40 − 45 + 12 52 − 45 7 12 3 12 8 165) a) d) = = g) ÷ = . = 3 60 60 60 10 8 10 3 5 14 − 15 1 32 2 2 2 7 7b) =− e) h) − ÷ =− . =− 35 35 15 3 7 3 2 3 8 1 −32 + 3 29 1 ad − ab a (d − b )c) − + = =− f) i) = 3 4 12 12 4 bcd bcd